[PFF] CJ Stroud currently has an 83.7 grade on the season putting him ahead of Herbert (83.3)

Stroud I believe according to their metric is having the best rookie season by a QB.

Usually, QBs tend to have mediocre rookie years obviously since they judge the play and not accounting for years. They mention the big leap happens sophomore year.

Justin Herbert's dominant rookie year was graded out as 79.9. Stroud is currently tied with RG3's rookie year (83.7).

And remember, RG3 was a beast until that injury